Countess Leonore was baptised in the chapel of Het Loo Palace in Apeldoorn on 8 October 2006. Her godparents are her paternal aunt, Queen Máxima; her maternal uncle, Marius Brinkhorst; her father's first cousin, Juliana Guillermo; and Count Jean-Charles Ullens de Schooten Whettnall.

By Royal Decree of 11 May 2001, nr. 227, it was determined that all children and male-line descendants of Prince Constantijn of the Netherlands would bear the title of Count (Countess) of Orange-Nassau and the honorific Jonkheer (Jonkvrouwe) van Amsberg, and have the surname Van Oranje-Nassau van Amsberg.[2]

Upon the abdication of Queen Beatrix on 30 April 2013, the children of Prince Constantijn and Princess Laurentien ceased to be members of the Royal House, although continue to be members of the royal family.[3]